aboutsummaryrefslogtreecommitdiffstats
path: root/arch/ppc64
diff options
context:
space:
mode:
authorStephen Rothwell <sfr@canb.auug.org.au>2005-10-13 01:52:04 -0400
committerStephen Rothwell <sfr@canb.auug.org.au>2005-10-13 01:52:04 -0400
commite8a30302abc42a0c537b9326883523da9963deb6 (patch)
tree3d4dc948afff95a2a86805d75162a8cdb3baded6 /arch/ppc64
parenteec5ef909888cd9d25a61f904cd8f0db50ea0455 (diff)
powerpc: merge ptrace.c
Signed-off-by: Stephen Rothwell <sfr@canb.auug.org.au>
Diffstat (limited to 'arch/ppc64')
-rw-r--r--arch/ppc64/kernel/Makefile2
-rw-r--r--arch/ppc64/kernel/ptrace.c363
2 files changed, 1 insertions, 364 deletions
diff --git a/arch/ppc64/kernel/Makefile b/arch/ppc64/kernel/Makefile
index 1a8f3532885a..b1203b79edf0 100644
--- a/arch/ppc64/kernel/Makefile
+++ b/arch/ppc64/kernel/Makefile
@@ -12,7 +12,7 @@ obj-y := setup.o entry.o misc.o prom.o
12endif 12endif
13 13
14obj-y += irq.o idle.o dma.o \ 14obj-y += irq.o idle.o dma.o \
15 time.o signal.o syscalls.o ptrace.o \ 15 time.o signal.o syscalls.o \
16 align.o bitops.o pacaData.o \ 16 align.o bitops.o pacaData.o \
17 udbg.o sys_ppc32.o ioctl32.o \ 17 udbg.o sys_ppc32.o ioctl32.o \
18 ptrace32.o signal32.o rtc.o \ 18 ptrace32.o signal32.o rtc.o \
diff --git a/arch/ppc64/kernel/ptrace.c b/arch/ppc64/kernel/ptrace.c
deleted file mode 100644
index b1c044ca5756..000000000000
--- a/arch/ppc64/kernel/ptrace.c
+++ /dev/null
@@ -1,363 +0,0 @@
1/*
2 * linux/arch/ppc64/kernel/ptrace.c
3 *
4 * PowerPC version
5 * Copyright (C) 1995-1996 Gary Thomas (gdt@linuxppc.org)
6 *
7 * Derived from "arch/m68k/kernel/ptrace.c"
8 * Copyright (C) 1994 by Hamish Macdonald
9 * Taken from linux/kernel/ptrace.c and modified for M680x0.
10 * linux/kernel/ptrace.c is by Ross Biro 1/23/92, edited by Linus Torvalds
11 *
12 * Modified by Cort Dougan (cort@hq.fsmlabs.com)
13 * and Paul Mackerras (paulus@linuxcare.com.au).
14 *
15 * This file is subject to the terms and conditions of the GNU General
16 * Public License. See the file README.legal in the main directory of
17 * this archive for more details.
18 */
19
20#include <linux/config.h>
21#include <linux/kernel.h>
22#include <linux/sched.h>
23#include <linux/mm.h>
24#include <linux/smp.h>
25#include <linux/smp_lock.h>
26#include <linux/errno.h>
27#include <linux/ptrace.h>
28#include <linux/user.h>
29#include <linux/security.h>
30#include <linux/audit.h>
31#include <linux/seccomp.h>
32#include <linux/signal.h>
33
34#include <asm/uaccess.h>
35#include <asm/page.h>
36#include <asm/pgtable.h>
37#include <asm/system.h>
38#include <asm/ptrace-common.h>
39
40/*
41 * does not yet catch signals sent when the child dies.
42 * in exit.c or in signal.c.
43 */
44
45/*
46 * Called by kernel/ptrace.c when detaching..
47 *
48 * Make sure single step bits etc are not set.
49 */
50void ptrace_disable(struct task_struct *child)
51{
52 /* make sure the single step bit is not set. */
53 clear_single_step(child);
54}
55
56int sys_ptrace(long request, long pid, long addr, long data)
57{
58 struct task_struct *child;
59 int ret = -EPERM;
60
61 lock_kernel();
62 if (request == PTRACE_TRACEME) {
63 /* are we already being traced? */
64 if (current->ptrace & PT_PTRACED)
65 goto out;
66 ret = security_ptrace(current->parent, current);
67 if (ret)
68 goto out;
69 /* set the ptrace bit in the process flags. */
70 current->ptrace |= PT_PTRACED;
71 ret = 0;
72 goto out;
73 }
74 ret = -ESRCH;
75 read_lock(&tasklist_lock);
76 child = find_task_by_pid(pid);
77 if (child)
78 get_task_struct(child);
79 read_unlock(&tasklist_lock);
80 if (!child)
81 goto out;
82
83 ret = -EPERM;
84 if (pid == 1) /* you may not mess with init */
85 goto out_tsk;
86
87 if (request == PTRACE_ATTACH) {
88 ret = ptrace_attach(child);
89 goto out_tsk;
90 }
91
92 ret = ptrace_check_attach(child, request == PTRACE_KILL);
93 if (ret < 0)
94 goto out_tsk;
95
96 switch (request) {
97 /* when I and D space are separate, these will need to be fixed. */
98 case PTRACE_PEEKTEXT: /* read word at location addr. */
99 case PTRACE_PEEKDATA: {
100 unsigned long tmp;
101 int copied;
102
103 copied = access_process_vm(child, addr, &tmp, sizeof(tmp), 0);
104 ret = -EIO;
105 if (copied != sizeof(tmp))
106 break;
107 ret = put_user(tmp,(unsigned long __user *) data);
108 break;
109 }
110
111 /* read the word at location addr in the USER area. */
112 case PTRACE_PEEKUSR: {
113 unsigned long index;
114 unsigned long tmp;
115
116 ret = -EIO;
117 /* convert to index and check */
118 index = (unsigned long) addr >> 3;
119 if ((addr & 7) || (index > PT_FPSCR))
120 break;
121
122 if (index < PT_FPR0) {
123 tmp = get_reg(child, (int)index);
124 } else {
125 flush_fp_to_thread(child);
126 tmp = ((unsigned long *)child->thread.fpr)[index - PT_FPR0];
127 }
128 ret = put_user(tmp,(unsigned long __user *) data);
129 break;
130 }
131
132 /* If I and D space are separate, this will have to be fixed. */
133 case PTRACE_POKETEXT: /* write the word at location addr. */
134 case PTRACE_POKEDATA:
135 ret = 0;
136 if (access_process_vm(child, addr, &data, sizeof(data), 1)
137 == sizeof(data))
138 break;
139 ret = -EIO;
140 break;
141
142 /* write the word at location addr in the USER area */
143 case PTRACE_POKEUSR: {
144 unsigned long index;
145
146 ret = -EIO;
147 /* convert to index and check */
148 index = (unsigned long) addr >> 3;
149 if ((addr & 7) || (index > PT_FPSCR))
150 break;
151
152 if (index == PT_ORIG_R3)
153 break;
154 if (index < PT_FPR0) {
155 ret = put_reg(child, index, data);
156 } else {
157 flush_fp_to_thread(child);
158 ((unsigned long *)child->thread.fpr)[index - PT_FPR0] = data;
159 ret = 0;
160 }
161 break;
162 }
163
164 case PTRACE_SYSCALL: /* continue and stop at next (return from) syscall */
165 case PTRACE_CONT: { /* restart after signal. */
166 ret = -EIO;
167 if (!valid_signal(data))
168 break;
169 if (request == PTRACE_SYSCALL)
170 set_tsk_thread_flag(child, TIF_SYSCALL_TRACE);
171 else
172 clear_tsk_thread_flag(child, TIF_SYSCALL_TRACE);
173 child->exit_code = data;
174 /* make sure the single step bit is not set. */
175 clear_single_step(child);
176 wake_up_process(child);
177 ret = 0;
178 break;
179 }
180
181 /*
182 * make the child exit. Best I can do is send it a sigkill.
183 * perhaps it should be put in the status that it wants to
184 * exit.
185 */
186 case PTRACE_KILL: {
187 ret = 0;
188 if (child->exit_state == EXIT_ZOMBIE) /* already dead */
189 break;
190 child->exit_code = SIGKILL;
191 /* make sure the single step bit is not set. */
192 clear_single_step(child);
193 wake_up_process(child);
194 break;
195 }
196
197 case PTRACE_SINGLESTEP: { /* set the trap flag. */
198 ret = -EIO;
199 if (!valid_signal(data))
200 break;
201 clear_tsk_thread_flag(child, TIF_SYSCALL_TRACE);
202 set_single_step(child);
203 child->exit_code = data;
204 /* give it a chance to run. */
205 wake_up_process(child);
206 ret = 0;
207 break;
208 }
209
210 case PTRACE_GET_DEBUGREG: {
211 ret = -EINVAL;
212 /* We only support one DABR and no IABRS at the moment */
213 if (addr > 0)
214 break;
215 ret = put_user(child->thread.dabr,
216 (unsigned long __user *)data);
217 break;
218 }
219
220 case PTRACE_SET_DEBUGREG:
221 ret = ptrace_set_debugreg(child, addr, data);
222 break;
223
224 case PTRACE_DETACH:
225 ret = ptrace_detach(child, data);
226 break;
227
228 case PPC_PTRACE_GETREGS: { /* Get GPRs 0 - 31. */
229 int i;
230 unsigned long *reg = &((unsigned long *)child->thread.regs)[0];
231 unsigned long __user *tmp = (unsigned long __user *)addr;
232
233 for (i = 0; i < 32; i++) {
234 ret = put_user(*reg, tmp);
235 if (ret)
236 break;
237 reg++;
238 tmp++;
239 }
240 break;
241 }
242
243 case PPC_PTRACE_SETREGS: { /* Set GPRs 0 - 31. */
244 int i;
245 unsigned long *reg = &((unsigned long *)child->thread.regs)[0];
246 unsigned long __user *tmp = (unsigned long __user *)addr;
247
248 for (i = 0; i < 32; i++) {
249 ret = get_user(*reg, tmp);
250 if (ret)
251 break;
252 reg++;
253 tmp++;
254 }
255 break;
256 }
257
258 case PPC_PTRACE_GETFPREGS: { /* Get FPRs 0 - 31. */
259 int i;
260 unsigned long *reg = &((unsigned long *)child->thread.fpr)[0];
261 unsigned long __user *tmp = (unsigned long __user *)addr;
262
263 flush_fp_to_thread(child);
264
265 for (i = 0; i < 32; i++) {
266 ret = put_user(*reg, tmp);
267 if (ret)
268 break;
269 reg++;
270 tmp++;
271 }
272 break;
273 }
274
275 case PPC_PTRACE_SETFPREGS: { /* Get FPRs 0 - 31. */
276 int i;
277 unsigned long *reg = &((unsigned long *)child->thread.fpr)[0];
278 unsigned long __user *tmp = (unsigned long __user *)addr;
279
280 flush_fp_to_thread(child);
281
282 for (i = 0; i < 32; i++) {
283 ret = get_user(*reg, tmp);
284 if (ret)
285 break;
286 reg++;
287 tmp++;
288 }
289 break;
290 }
291
292#ifdef CONFIG_ALTIVEC
293 case PTRACE_GETVRREGS:
294 /* Get the child altivec register state. */
295 flush_altivec_to_thread(child);
296 ret = get_vrregs((unsigned long __user *)data, child);
297 break;
298
299 case PTRACE_SETVRREGS:
300 /* Set the child altivec register state. */
301 flush_altivec_to_thread(child);
302 ret = set_vrregs(child, (unsigned long __user *)data);
303 break;
304#endif
305
306 default:
307 ret = ptrace_request(child, request, addr, data);
308 break;
309 }
310out_tsk:
311 put_task_struct(child);
312out:
313 unlock_kernel();
314 return ret;
315}
316
317static void do_syscall_trace(void)
318{
319 /* the 0x80 provides a way for the tracing parent to distinguish
320 between a syscall stop and SIGTRAP delivery */
321 ptrace_notify(SIGTRAP | ((current->ptrace & PT_TRACESYSGOOD)
322 ? 0x80 : 0));
323
324 /*
325 * this isn't the same as continuing with a signal, but it will do
326 * for normal use. strace only continues with a signal if the
327 * stopping signal is not SIGTRAP. -brl
328 */
329 if (current->exit_code) {
330 send_sig(current->exit_code, current, 1);
331 current->exit_code = 0;
332 }
333}
334
335void do_syscall_trace_enter(struct pt_regs *regs)
336{
337 secure_computing(regs->gpr[0]);
338
339 if (test_thread_flag(TIF_SYSCALL_TRACE)
340 && (current->ptrace & PT_PTRACED))
341 do_syscall_trace();
342
343 if (unlikely(current->audit_context))
344 audit_syscall_entry(current,
345 test_thread_flag(TIF_32BIT)?AUDIT_ARCH_PPC:AUDIT_ARCH_PPC64,
346 regs->gpr[0],
347 regs->gpr[3], regs->gpr[4],
348 regs->gpr[5], regs->gpr[6]);
349
350}
351
352void do_syscall_trace_leave(struct pt_regs *regs)
353{
354 if (unlikely(current->audit_context))
355 audit_syscall_exit(current,
356 (regs->ccr&0x1000)?AUDITSC_FAILURE:AUDITSC_SUCCESS,
357 regs->result);
358
359 if ((test_thread_flag(TIF_SYSCALL_TRACE)
360 || test_thread_flag(TIF_SINGLESTEP))
361 && (current->ptrace & PT_PTRACED))
362 do_syscall_trace();
363}
generated by cgit v1.2.2 (git 2.25.0) at 2024-12-26 18:18:23 -0500